The optimum placement of the
ESD protection device is as close to the connector as possible
EMI during an ESD
event can couple from the trace being struck to other nearby
unprotected traces, resulting in early system failures
The PCB designer must
minimize the possibility of EMI coupling by keeping any unprotected
traces away from the protected traces which are between the TVS and
the connector
Route the protected traces as
straight as possible
Eliminate any sharp corners
on the protected traces between the TVS and the connector by using rounded
corners with the largest radii possible
Electric fields tend
to build up on corners, increasing EMI coupling
If pin 1 or pin 2 is
connected to ground, use a thick and short trace for this return path